21155014150044 has 48 divisors (see below), whose sum is σ = 49938975273600. Its totient is φ = 6969451470400.

The previous prime is 21155014150043. The next prime is 21155014150073. The reversal of 21155014150044 is 44005141055112.

It is a junction number, because it is equal to n+sod(n) for n = 21155014149987 and 21155014150014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21155014150043) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14819094 + ... + 16183805.

It is an arithmetic number, because the mean of its divisors is an integer number (1040395318200).

Almost surely, 2^{21155014150044} is an apocalyptic number.

It is an amenable number.

21155014150044 is an abundant number, since it is smaller than the sum of its proper divisors (28783961123556).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21155014150044 is a wasteful number, since it uses less digits than its factorization.

21155014150044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31003570 (or 31003568 counting only the distinct ones).

The product of its (nonzero) digits is 16000, while the sum is 33.

The spelling of 21155014150044 in words is "twenty-one trillion, one hundred fifty-five billion, fourteen million, one hundred fifty thousand, forty-four".